IQ tests have been around for more than a century. They were originally created in France to help identify students who needed extra help in school.

The U.S. government later used modified versions of these tests during World War I. Leaders in the armed forces knew that letting unqualified people into battle could be dangerous. So they used the tests to help find qualified candidates!

95% of people don’t see Juliet in this photo, how about you?

The military continues to do that today. The Armed Forces Qualification Test is one of many different IQ tests in use. IQ tests have many different purposes, notes Joel Schneider. He is a psychologist at Illinois State University in Normal.

Some IQ tests have been designed to assess children at specific ages. Some are for adults. And some have been designed for people with particular disabilities.

Answer: Turn the image upside down and see on Romeo’s right arm, you will see Juliet.